<!--
 * new page
 * @author: eminem89
 * @since: 2023-12-24
 * Person.vue
-->
<template>
    <div class="person">
        <h1>
            情况四：监视【ref】或【reactive】定义的【对象类型】数据中的某个属性
        </h1>
        <h2>姓名：{{ person.name }}</h2>
        <h2>年龄：{{ person.age }}</h2>
        <h2>汽车：{{ person.car.c1 }}、{{ person.car.c2 }}</h2>
        <button @click="changeName">修改名字</button>
        <button @click="changeAge">修改年龄</button>
        <button @click="changeC1">修改第一台车</button>
        <button @click="changeC2">修改第二台车</button>
        <button @click="changeCar">修改整个车</button>
    </div>
</template>

<script setup lang="ts" name="Person">
import { reactive, watch } from 'vue';
// 数据
let person = reactive({
    name: '张三',
    age: 18,
    car: {
        c1: '奔驰',
        c2: '宝马',
    },
});
// 方法
function changeName() {
    person.name += '~';
}
function changeAge() {
    person.age += 1;
}
function changeC1() {
    person.car.c1 = '奥迪';
}
function changeC2() {
    person.car.c2 = '大众';
}
function changeCar() {
    person.car = { c1: '雅迪', c2: '爱玛' };
}
// 监视，情况五：监视上述的多个数据
watch(
    [() => person.name, person.car],
    (newValue, oldValue) => {
        console.log('person.car变化了', newValue, oldValue);
    },
    { deep: true },
);
</script>

<style scoped>
.person {
    background-color: skyblue;
    box-shadow: 0 0 10px;
    border-radius: 10px;
    padding: 20px;
}

button {
    margin: 0 5px;
}
</style>
